If the number of tweets a day was a stock there would be plenty of millionaires. Twitter announced that it is now seeing 50 million tweets per day from its users. That’s an average of 600 tweets a second. Just imagine, that doesn’t even include how many times those tweets were delivered since most people have multiple followers.

To put this explosive growth in perspective, back in 2007 the website was seeing only 5,000 tweets a day. By 2008 the number had grown to 300,000 only to be outdone in 2009 with 2.5 million per day. By the end of 2009 there were 35 million tweets a day which adds up to a growth of 1400%. With this kind of growth the engineers and execs have to be asking themselves just one question. Where is the ceiling?

Could you imagine being the person in charge of managing the infrastructure growth for Twitter’s environment? At some point they had to just take reasonable projections and throw them out the window. Nevertheless, except for a few hiccups along the way, I think Twitter has been able to keep up with its growth fabulously. I wouldn’t be surprised to see even the 50 million tweets a day metric double by the end of the year.